| decerebrate r. |
the posture produced in an experimental animal by decerebration (q.v.), marked by rigid extension of the lower limbs. In humans it occurs as a result of lesions of the upper part of the brain stem or of severe bilateral lesions of the cerebrum and is manifested as a posture of lying in rigid extension with upper limbs internally rotated at the shoulders and pronated; elbows, knees, and hips rigidly extended; and fingers, ankles, and toes flexed. Cf. antigravity reflex.
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